Coil-cases for insertion in cables.



P. L. RHODES.

0011. CASE FQR INSBRTION IN GABLES.

APPLICATION FILED FEB. 7, 1911.

Patented July 14, 1914,

sired manner, and short stub cables 12 carrying their terminals pass axially through UNITED STATES PATENT oration;

FREDERICK L. RHODES, OF SHORT HILLS, NEW JERSEY, ASSIGNOR TO AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.

COIL-CASES FOR INSERTION IN CABLES.

Specification of Letters Patent.

Application filed February 7, 1911.

Patented July 14, 1914. Serial No. 607,177. 3

To all whom it may concern Be it known that I, FREDERICK L. RHODES, residing at Short Hills, in the county of Essex and State of New Jersey, have invented certain Improvements in Coil-Gases for Insert-ion in Cables, of which the following is a specification.

My invention concerns cases for inclosing loadin 'coils or like instrumentalities which are tol e included in signaling or transmission circuits, and has for its particular objects the provision of such a caseand its arrangement within the structure of a submarine cable, this association being effected without greatly increasing the diameter of the cable or lessening its strength.

In the accompanying drawing, in which like characters designate similar parts in all views, Figure 1 is a broken side elevation of an embodiment of my invention in place in acable, parts being in section and the outer protective covering "of the ,cable being omitted, and Fig. 2 is a broken side elevation of the cable and case therein, the armor being illustrated in its position over the case.

The main body portion or case 10 for inclosing loading or other coils 11 is in the form of a continuous tube, extra heavy wrought iron pipe being suitable for this purpose. The coils are mounted in the case in any dethe opposite ends of said case.

The inner ends of the case are each threaded at'13 to engage a screw plug or head 14 having a nipple or short tube 15 surrounding an axial opening through the head and being continued into the case by an wiped joints 18,- 18.

extension 16, this tube permitting the exit from the case of the terminal cable 12. Each cable 12 has a comparatively loose section 17 of lead sheath, which extends through tube 15 and projects just inside and for a considerable distance outside the tube.

When the assembling of the case and its coils is to be completed, a moisture-proof seal is provided at every juncture between metal parts To accomplish this the sheath section 17 is first placed in position in the tube of each head and soldered thereto by Then the terminal cable is drawn through the sheath and tube, and the head screwed in place with its outer face substantially flush with the edge of the case. The adjacent angles of the case and flange may have been previously beveled to furnlsh a groove 19, and along this line these elements are welded,.conveniently by an oxyacetylene flame, a strip of Norway iron being fused in to fill the groove. The coils are now incased in unbroken metal, save for the spaces between the cables -l2 and theirsheaths. After utilizing these spaces to test the integrity of the joints, by creating through them a vacuum in the chambers left in the case beyond the insulating compound surrounding the coils, said chambers and sheath spaces are-filled by forcing in additional insulating compoun Cooperating with each end of the main case is an independent portion or auxiliary case 20 of frusto-conical form, fitting closely over or telescoping with the exterior of the main case at 21, and tapering therefrom to a cylindrical extremity in which is an opening 22 just large enough to freely admit the sheath or inner protective covering of the main cable, the extremities of adjacent sec-- tions of said cable, being indicated at 23. \Vhen the case with its contained coils is to be inserted in the main cable, the outer protective covering of the latter, including a jute wrapping 24 and armor wires 25, is unwound and laid back to a suitable dis tance, and the tapered end portions 20 of the case are slipped over the surface of the cable sections. The conductors 26 of the terminal and main cables are now spliced in the usual manner, and the splices covered with lead sleeves 27 soldered to the sheaths of the main and terminal cables at 28. The conductor splices having been completed, the cones 20 are fitted over the ends of the main case. Openings closed by screw plugs 29 are provided for the introduction of suitable insulating filling. The coils and splices are therefore inclosed in a substantially continuous metal container with its ends gradually tapering to approximately. the diameter of the cable sheath. Over this complete case the armor wires 25 are laid in spiral bands, the'bauds from the opposite cable sections alternating with one another, as is shown in Fig. 2 of the drawings, the wires indicated in light outline proceeding from the right, and those indicated by heavy decreasing its strength, flexibility or the of the main cable structure and including a the armor wires of said main cable being said auxiliary case being joined to the main the case by circular bands or servings 30 of galvanized 'iron wire. The other set of bands is then applied and servings 31*W011I1d over both sets.

The connection of the armor wires to the case is completed by long servings 32 over their extremities at the junctures'of the case ends and the cable sections. On account of the gradual reduction in diameter of the case by the taper of these end portions, the armor wires lie smoothly without slack or abrupt angles at whichthey might suffer injury. Over the whole the jute covering may be 'carried, as is partially indicated in Fig. 2, and this saturated with Stockholm pine tar or the like.

It will be seen that in such an organization, the coils,'.their connecting splices and the inclosing elements become parts of a unitary cable structure, without materially ease with which it may be handled, and without sensibly increasing its weight, and that said coils and connections are efi'ectively protected against mechanical injury and access of moisture.

Having thus described my invention, I claim:

1. The combination with a main cable including conductors and a protective covering, of a casing structure carried by the main cable and including a main case, terminal conductors extending from within and projecting on the exteriorof said main case and being joined to the main cable conductors, and means for connecting the protective coverin to the casing structure.

2. The combination with a main cable including conductors and armor wires,'of a casing structure carried by but independent main case, and terminal conductors extending from. within and project-in on the exterior of said main case and eing joinedv to the cable conductors o; the main cable,

extended over the casing structure.

I 3. The combination with a main cable, of a casing structure carried; by said main cable and including a main case, a terminal cable extending from within said vmain case through the wall thereof and being connected to the main cable, and an auxiliary case constituting part of the casing structure,

case and surrounding the connection between the cables.

4. The combination with a main cable, of a casing structure carried by the main cable and including a Ina-in case, a terminal cable leading from within said case through the end wall thereof, a'seal at the juncture ber splice connecting the main and terminal cables, and means for protecting said splice carried by said main case and constituting part of the casing structure.

5; The combination with a cable including conductors and a covering therefor constituting part of the cable, of a case independent of the cable structure, a portion of said covering extendin into the case and another portion of sai covering extending over the outside of the case. p

6. The combination with a cable including'conductors and a covering therefor constituting part of the cable, of a case independent of the cable structure having a tapered end over'which said covering of the cable extends.

p 7. The combination with a cable including conductors and armor wires, of a case independent of the cable structure having a tapered end portion, the armor wires continuing from the cable over saidtapered end portion and case.

8. The combination with a cable including conductors and armor wires, of a case comprising a cylindrical main portion and an end portion telescoping with said main portion, said armor wires continuing from the cable over said end and main portions of the case.

9. The combination with a main cable having a protective covering, of a casing a main case inclosing said coil and an auxiliary case attached to and extending outward from the main case, a terminal cable extending from. the coil in the main case into the auxiliary case, and a splice between the main cable and terminal cable situated in the auxiliary case and connecting the coil to the main cable.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, thisfirst day of February 1911. I

FREDERICK L. RHODFS. lVitnesses:

G. T. Broom, H. O. CARPENTER. 

